@article{onconstraintprogrammingforanewflexible,
  title = {Resource-constrained multi-project scheduling with activity and time flexibility},
  author = {Viktoria A. Hauder and Andreas Beham and Sebastian Raggl and Sophie N. Parragh and Michael Affenzeller},
  year = {2019},
  eprint = {1902.09244},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1902.09244v2},
}